*{
    margin:0px;
    padding:0px;
}
body{
    background-image: url("/img/背景2.jpg");
    background-size:1920px 1080px;
    background-repeat: no-repeat;
}
#main{
    border:1px solid black;
    background-color: rgba(44,40,44,.4);
    width:600px;
    height:550px;
    /*设置div块居中*/
    position: absolute;
    left:0;
    top:0;
    right:0;
    bottom: 0;
    margin: auto;
    border-radius: 10px;
    color:white;
}
#divhead p{
    margin-top:30px;
    text-align:center;
    font-size:30px;
    color:white;
    margin-bottom: 20px;
}
#main form{
    width:500px;
    color:white;
}
.layui-form-item .layui-form-label{
    color: white;
}
.input-code {
    outline: none;
}
.input-span{
    display:inline;
}